*{
    list-style: none;
    text-decoration: none; 
}
/*导航栏*/
.my_nav{
    position: fixed;
    width: 100%;
    z-index: 10;
    padding-top: 15px;
    padding-bottom: 15px;
}
a,a:hover{
    text-decoration: none;
}
.my_toggler{
    visibility: hidden;
    float: right;outline: none;
    border: 1px solid white;
    outline: none;
}
.dynamic_ul{
    display: flex;
    width: 100%;
    margin-top: 5px;
    justify-content: space-between;
}
.dynamic_ul li a{
    color: white;
    font-size: 16px;
}
.dynamic_ul li:hover{
    border-bottom: 2px solid white;
    padding-bottom: 10px;
}
.register_box{
   padding: 5px 15px;
   color: white; 
   width: 120px;
   display: flex;
   background-color: rgb(255, 255, 255,0.3);
   justify-content: space-around;
   margin: auto;
   border: 1px solid white;
}
header{
    background-image: url("../img/top_banner3.png");
    padding-top: 111px;
    padding-bottom: 107px;
}
.head_h1,.head_h2{
    color: white;
    text-align: center;
    margin-top: 15px;
    margin-bottom: 15px;
}
.head_h2{
    opacity: 0.5;
    font-size: 16px;
}
.page_section{
    padding-top: 100px;
    padding-bottom: 100px;
}
h2{
    text-align: center;
    font-size: 32px;
}
.section_title::after{
    width: 120px;
    content: '';
    display: block;
    margin: 20px auto 30px auto;
    height: 4px;
    background-color: #468EFF;
}
.page_path{
    margin-top: 15px;
}
.visited_path{
    font-size: 12px;
    color: gray;
}
.current_path{
    color: black;
    font-size: 12px;
}
.case_container{
    margin: 10px 5px 10px 5px;
    border: 1px solid #dddddd;;
}
.case_item_mark{
    width: 100%;
    height: 200px;
    display: flex;
    visibility: hidden;
    background-color: gray;
    background: rgba(0, 0, 0, 0.5);
}
.case_img:hover .case_item_mark{
    visibility: visible;
}
.case_img{
    height: 200px;
    background-size: 100%;
    background-repeat: no-repeat;
}
.case_name{
    display: block;
    text-align: center;
    color: rgba(79, 79, 79, 1);
    font-size: 18px;
    margin: 20px auto;
}
.btn_get_this{
    background-color: rgba(70, 142, 255, 1);
    width: 228px;
    height: 40px;
    opacity: 1;
    border: none;
    outline: none;
    color: white;
    margin: auto;
}
/*底部*/
.space_between{
    display: flex;
    justify-content: space-between;
}
footer{
    color: rgba(187, 187, 187, 1);
    padding-bottom: 80px;
    padding-top: 40px;
    background-color: rgba(34, 38, 61, 1);
}
footer ul li{
    margin-left: 15px;
    margin-right: 15px;
}
.qr_code_img{
    display: block;
    width: 80px;
    margin: 10px auto;
}
.bottom_effect::before{
    float: left;
    display: block;
    height: 100px;
    width: 1px;
    content: '';
    background-color: gray;
}
.copyright_info{
    background-image: url(../img/8_ic_2.png);
    background-repeat: no-repeat;
    padding-left: 20px;
    text-align: center;
    width: 500px;
    margin: auto;
}
.such_link li a{
    color: rgba(187, 187, 187, 1);
    margin-top: 41px;
}
.nav_link li a{
    color: rgba(187, 187, 187, 1); 
}
@media screen and (max-width:990px){
    .dynamic_ul{
        flex-direction: column;
    }
    .register_box{
        display: none;
    }
    .my_toggler{
        visibility: visible;
    }
    .bottom_nav{
        display: none;
    }
    .such_link{
        display: none;
    }
    .qr_code_img{
        display: block;
        width: 83px;
        margin: 10px auto 40px auto;
    }
    .bottom_effect::before{
        float: left;
        display: none;
        height: 100px;
        width: 1px;
        content: '';
        background-color: gray;
    }
}